• Journal of Digital Convergence
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• v.19 no.6
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• pp.315-321
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• 2021

This study analyzes the characteristics of the process of changing content as print media is remediation as video media. By applying the dual logic of remediation, we analyze the process of remediation analog media(print) into new media(video). Through the results, we present the possibility that remediation methods using changes and variations in various media can be applied to the design methodology. Marvel Comics has been remediationed as Marvel Cinematic Universe. By understanding the phenomenon that analog media is remediation as new media, Design methodologies can be presented so that designers can derive the results by using the characteristics of remediation when designing.

• Journal of Broadcast Engineering
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• v.10 no.4 s.29
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• pp.463-473
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• 2005

In this paper, we propose Adaptive GOP Structure to enhance the coding performance of scalable video coding in JVT. Adaptive GOP Structure considers temporal variances of video sequence. In general, SVC encodes a video sequence with fixed GOP size. The coding performance is varying according to the temporal variance of a video sequence. Thus, Adaptive GOP Structure method is proposed. It selects GOP size adaptively by considering temporal variance of video sequence. In the experiments, the propose method showed the enhanced coding performance in most sequences. The PSNR gain of Crew sequence is up to 0.63 dB.

• Journal of Korea Multimedia Society
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• v.4 no.4
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• pp.297-305
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• 2001

Recently advances in high-speed networks and multimedia computer technologies allow new types of multimedia applications to manipulate large volumes of multimedia data. However, in the real time and/or the heterogeneous data transmissions, there are many difficulties such as network transmission delay, the implementation difficulties, and so on. To solve these problems, in this paper, we extend the method of the multimedia service design which is proposed by OMG. To do this, we suggest an efficient real time audio/video stream framework, called Smart Explorer, based un CORBA and JMF Java Media API. And we separate the transmission path of control data from that of media data and use RTP/RTCP protocol for efficient real time audio/video transmission. Also we show the appropriate implementation of the audio/video stream system based on our suggested framework Smart Explorer. In the future, we expect our audio/video stream system to be applied to the real time communication software such as broadcasting, distance learning, and video conferencing.

• Journal of Broadcast Engineering
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• v.15 no.1
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• pp.76-88
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• 2010

Recently, LED background image devices are used for the production of broadcasting programs. But the effective advantages of LED background image devices are not realized for good HD video quality because the correlations between lighting sources and LED background image devices are not analyzed yet. In this paper, we analyze the color change and light intensity that lighting sources and the light intensity ratio of LED background images influence on a subject, making use of equipments used in real broadcasting, and examine the correlations between HD video quality and the light intensity ratio of LED background images. As a result in this experiment, the video is most expressed having an 20[IRE] effect on a subject when the light intensity of LED background image is 6%. When the LED background image is light, the light and darkness of video is distorted and when the LED background image is dark, the colors of image are distorted.

• Broadcasting and Media Magazine
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• v.17 no.4
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• pp.35-46
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• 2012

현재 ITU-T Video Coding Experts Group(VCEG)과 ISO/IEC Moving Picture Experts Group(MPEG)에서는 고효율 영상 압축 기술(High-Efficiency Video Coding; HEVC) 표준화에 대한 막바지 작업을 진행하고 있다. 본 원고에서는 기존 H.264/AVC 대비 동일 주관적 화질 대비 압축률 2배를 목표로 하고 있는 HEVC 영상 압축 기술에 대해, 그 배경 및 주요 구성 요소 기술에 대해 설명하고, 표준화 진행과정에 대해서 간략하게 소개하고자 한다.

• Broadcasting and Media Magazine
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• v.15 no.4
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• pp.95-107
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• 2010

최근 MPEG에서는 ITU-T와 함께 JCT-VC(Joint Collaboration Team on Video Coding)를 구성하여 H.264/AVC 보다 두 배 이상 높은 고효율의 비디오 압축 표준을 진행하고 있으며, 이 새로운 표준을 가칭으로 HEVC(High Efficiency Video Coding)라 부른다. HEVC는 기존의 비디오 압축 표준들과 같이 하이브리드 부호화 구조를 사용하고 있으며, 고해상도 및 고효율의 압축을 실현하기 위해서 많은 새로운 기술들이 소개되었다. UHD급 이상의 고해상도 영상을 위해 큰 블록 단위의 부호화 처리와 변환 부호화 기술이 제안되었다. 그리고 H.264/AVC의 화면 내 예측과 화면 간 예측에 대한 성능 향상을 위해 많은 기술들이 소개되었다. 본 기고에서는 다양한 HEVC 기술 중에 엔트로피 부호화 방법에 대해서 소개한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 1998.06b
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• pp.45-50
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• 1998

Several 3 dimensional image display systems were recently developed in Korea. These are a holographic video system based on pulse laser illumination, ad 8-view 3 dimensional image system capable of displaying computer generated 3 dimensional images and multiview 3 dimensional imaging system based on moving aperture and holographic screens of both transmission and reflection types. All these systems require no special glasses to watch and works impressively.

• Broadcasting and Media Magazine
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• v.28 no.1
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• pp.29-37
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• 2023

국제표준화 단체 MPEG과 VCEG이 연합하여 만든 기구인 Joint Video Explorer Team (JVET)은 Versatile Video Coding (VVC)/H.266 완성 이후, 새로운 표준을 준비하기 위한 차세대 코딩 기술을 연구하기 시작하였다. 두 가지 큰 연구 방향이 설정되어 스터디가 진행 중인데, 하나의 방향은 기존 코덱에서 많이 활용되었던 신호 처리 기반 기술 연구이고, 다른 방향은 신경망을 활용하여 새로운 코딩 기술을 연구하는 것이다. 신경망 기반 비디오 코딩은 표준화에서 공식적으로 연구된 적이 없으며, 해당 시도는 차세대 표준을 준비하기 위해서 처음으로 하는 시도이다. 본 기고에서는 비디오 코딩 표준의 새로운 방향에 대한 통찰력을 제공하기 위해 JVET에서 새롭게 시작되고 있는 신경망 기반 비디오 코딩 연구에 대한 동향을 리뷰하고자 한다.

• Journal of Broadcast Engineering
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• v.13 no.5
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• pp.662-676
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• 2008

This paper presents a video copy detection algorithm that blocks online transfer of illegally copied DTV broadcast programs. Particularly, the proposed algorithm establishes a set of keyframes by detecting abrupt changes of luminance, and then exploits the spatio-temporal features of keyframes. Comparing with the preregistered features stored in the database of DTV broadcast programs, the proposed scheme performs a function of video filtering in order to distinguish whether an uploaded video is illegally copied or not. Note that we analyze only a set of keyframes instead of an entire video frame. Thus, it is highly efficient to identify illegal copied video when we deal with a vast size of broadcast programs. Also, we confirm that the proposed technique is robust to a variety of video edit-effects that are often applied by online video redistribution, such as apsect-ratio change, logo insertion, caption insertion, visual quality degradation, and resolution change (downscaling). In addition, we perform a benchmark test in which the proposed scheme outperforms previous techniques.

• ETRI Journal
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• v.36 no.2
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• pp.232-241
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• 2014

A holographic display system with a 22-inch LCD panel is developed to provide a wide viewing angle and large holographic 3D image. It is realized by steering a narrow viewing window resulting from a very large pixel pitch compared to the wave length of the laser light. Point light sources and a lens array make it possible to arbitrarily control the position of the viewing window for a moving observer. The holographic display provides both eyes of the observer with a holographic 3D image using two vertically placed LCD panels and a beam splitter to support the holographic stereogram.